61223332251 has 4 divisors (see below), whose sum is σ = 81631109672. Its totient is φ = 40815554832.

The previous prime is 61223332213. The next prime is 61223332259. The reversal of 61223332251 is 15223332216.

61223332251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61223332251 - 2¹⁹ = 61222807963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61223332259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10203888706 + ... + 10203888711.

It is an arithmetic number, because the mean of its divisors is an integer number (20407777418).

Almost surely, 2^61223332251 is an apocalyptic number.

61223332251 is a deficient number, since it is larger than the sum of its proper divisors (20407777421).

61223332251 is a wasteful number, since it uses less digits than its factorization.

61223332251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20407777420.

The product of its digits is 12960, while the sum is 30.

Adding to 61223332251 its reverse (15223332216), we get a palindrome (76446664467).

The spelling of 61223332251 in words is "sixty-one billion, two hundred twenty-three million, three hundred thirty-two thousand, two hundred fifty-one".